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CVE-2026-81739— Paytm Payment Gateway < 2.8.9 - Unauthenticated Stored XSS via Payment Callback

Quick assessment

Affected
Unknown Paytm Payment Gateway
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Paytm 支付网关 WordPress 插件在 2.8.9 版本之前，未对从支付回调中存储的数据进行清理和转义，便在管理页面中输出这些数据。此外，当启用该网关但未配置凭据时，对这些回调的完整性校验可以被伪造，从而允许未经身份验证的用户存储脚本，这些脚本将在商店管理员的会话中执行。

AI Predicted 9.8 Difficulty: Easy
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I. Basic Information for CVE-2026-81739

Vulnerability Information
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Vulnerability Title
Paytm Payment Gateway < 2.8.9 - Unauthenticated Stored XSS via Payment Callback
Source: CVE Program / CVE List V5
Vulnerability Description
The Paytm Payment Gateway WordPress plugin before 2.8.9 does not sanitize and escape data it stores from payment callbacks before outputting it in an admin page, and the integrity check on those callbacks can be forged when the gateway is enabled without credentials, allowing unauthenticated users to store scripts that will run in the session of a store administrator.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Paytm Payment Gateway 0 ~ 2.8.9 -

II. Public POCs for CVE-2026-81739

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III. Intelligence Information for CVE-2026-81739

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Other References for CVE-2026-81739 (1)

Same Patch Batch · Unknown · 2026-10-01 · 15 CVEs total

CVE-2026-96173 Payments for Hubtel < 1.0.2 - Unauthenticated Order Key Disclosure via IDOR
CVE-2026-96200 Payments for Hubtel < 1.0.2 - Unauthenticated Payment Confirmation Forgery via Delayed Pay
CVE-2026-96255 Payments for Hubtel < 1.0.2 - Unauthenticated Payment Gateway Credentials Disclosure via D
CVE-2026-89296 Pro Like Button < 2.0 - Unauthenticated SQLi via 'postid' Parameter
CVE-2026-87973 If-So Dynamic Content 1.9.9 - 1.10.1 - Editor+ Stored XSS via Conversion Name
CVE-2026-87970 If-So Dynamic Content 1.8 - 1.10.1 - Reflected XSS via render_ifso_shortcodes
CVE-2026-92412 Five Star Restaurant Reviews < 2.3.14 - Reflected XSS
CVE-2026-90972 WP Fusion Lite < 3.48.0 - Subscriber+ User Email Disclosure and Cross-User CRM Data Deleti
CVE-2026-90974 WP Fusion Lite 3.37.14 - 3.47.14 - Unauthenticated CRM Integration Settings Update
CVE-2026-19253 Cache Enabler < 1.8.17 - Unauthenticated Arbitrary File and Directory Deletion via cache_e
CVE-2026-81809 Paytm Payment Gateway < 2.8.9 - Unauthenticated SQLi via Payment Callback
CVE-2026-86610 Download Manager < 3.3.71 - Author+ Stored XSS via Package Icon
CVE-2026-101148 BackupSheep <= 1.8 - Unauthenticated Arbitrary File Deletion and Backup Exfiltration via E
CVE-2026-101147 Featured Image from URL (FIFU) Free & Premium - Administrator Account Creation via CSRF

IV. Related Vulnerabilities

Same product: Paytm Payment Gateway
Same vendor: Unknown

V. Comments for CVE-2026-81739

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